为什么我不断从python代码中收到500个内部服务器错误？

Question

我正在编写一个本应用作奇特字符搜索引擎的代码，但是，当javascript调用它时，我的python部分返回500错误。我知道javascript可以正常工作，因为我使用了教授给我们的示例python脚本对其进行了测试，但是我不知道为什么我的代码无法正常工作。它应该返回一个用逗号分隔不同值（字符串名称和其Wiki链接）的字符串。当我将cgi.FieldStorage（）更改为简单的输入并直接运行时，代码就起作用了，所以我不确定发生了什么。

#!/usr/bin/env python3
# namelookup.py - Program to display name statistics
#!/usr/bin/env python

import cgi;
import cgitb
cgitb.enable()

from sortedcontainers import SortedDict
filePath="/home/class/SoftDev/namedata/"

def readfile(filename):
  infile=open(filename,mode='r')
  array=[]
  for line in infile:
    templine=line
    array.append(templine.split(','))
  infile.close()
  return array[::-1]

def removePunctuation(s):
  #Remove all punctuation from a string
  import string
  for c in string.punctuation:
    s= s.replace(c,"")
  return s

def createNameIndex(array):
  #creates an index of every name and the number of the lines tha   have that number on it
  index={}
  arraylen=len(array)
  for x in range(arraylen):
    allnames=removePunctuation(array[x][1]).lower().split(' ')
    #catalogs each name, so "Peter Parker" will also appear wheyou    search for just Peter or Parker. This has an addebenefit in    that it allows the program to determine answermore relevant to    the search, see the sortrelevancy function
    for name in allnames:
      if not name in index:
        index[name]=[x]
      else:
        index[name].append(x)
  return index

def createYearIndex(array):
  #creates an index the same as the name index, except with years  instead of names
  index={}
  arraylen=len(array)
  for x in range(arraylen):
    year=array[x][12][0:4]
    if year in index:
      index[year].append(x)
    else:
      index[year]=[x]
  return index


def searchFor(term,nameindex,yearindex):
  #searches the indexes for the desired term, keeping track oeach    row that comes  back, including duplicates, which wilbe used by    sortRelevancy
  allterms=term.split()
  allterms.append(term)
  allterms.append(term.replace(" ",''))
  results=[]
  for word in allterms:
    if word in nameindex:
      for number in nameindex[word]:
        results.append(number)
    if word in yearindex:
      for number in yearindex[word]:
        results.append(number)
  return results


def print_header():
    print ("""Content-type: text/html\n""")

def sortRelevancy(numberlist):
  #counts the number of times that each answer has appeared, then  sorts them in that order so that the name that appeared thmost    times is at the top.
  sortednumbers={}
  for number in numberlist:
    if not number in sortednumbers:
      sortednumbers[number]=1
    else:
      sortednumbers[number]=sortednumbers[number]+1
  finallist=sorted(sortednumbers.items(), key=lambda kv:(kv[1], [0])   )
  finallist= finallist[::-1]
  return finallist[0:10] # to prevent too many results, only th10    most relevant are shown

def main():
  #main function, combines all the above part and supplies the  interface for the user
  filename=readfile ('/home/class/SoftDev/marvel/marvel-wikia-data.csv')
  marvelindex=createNameIndex(filename)
  yearindex=createYearIndex(filename)
  form = cgi.FieldStorage()
  searchforme=removePunctuation(form.getvalue("name").lower())
  resultlist=searchFor(searchforme,marvelindex,yearindex)
  listicle=sortRelevancy(resultlist)
  results=""
  print_header()
  if listicle==[]:
    print("No results found.")
  else:
    for x in listicle:
        results+=filename[x[0]][1]+", "+filename[x[0]][2]+", "
  print(results)


main()